74 



Miscellaneous. 



written treatise on the theory of the microscope, its mechanical 

 construction, its accessory apparatus, and its use, each section 

 being copiously illustrated with good wood engravings, and hav- 

 ing a price-list attached. From personal experience we can cor- 

 dially recommend the Messrs. Grunow as careful and able work- 

 men. Their instruments are superior to those of the French, aud 

 nearly equal to the best of English makers ; indeed, nothing we 

 have seen can surpass their rack-work and lever-stage movements. 

 We regret to see them advertising two grades of object-glasses 

 — first and second class; the latter at little over half-price. 

 Surely such artists ought to confine themselves to their best work. 

 We note with some surprise the absence of a Micro-Photographic 

 apparatus among the accessory instruments, in view of the atten- 

 tion which microscopists have lately been giving to that mode of 

 illustrating their objects. We regret too that the Messrs. Grunow 

 should have seen fit to give no credit to those English makers, 

 the forms of whose stands they have copied. Their prices appear 

 high, but good workmanship must always be expensive. The 

 following comparisou may be of use to intending purchasers in 

 Canada. The instruments are nearly equal in point of excellence. 

 Messrs. Grunow's stand is somewhat heavier, but Messrs. Powell 

 & Lealand's Glasses are, in our opinion, superior : — 



Microscope Stand and Eye-pieces 



Mahogany Case 



|-inch Object Glass 



1-inch " " 



Bull's-eye Condenser 



Frog Plate 



Three Dark Wells 



Diaphragm Plate 



Lieberkuhn's 



Polariscope 



Animalcule Cage 



Steel Disc (Drawing) 



Forceps 



Cobweb-Micrometer Eye-piece . . 









Powell & Lea- 



Grunow & Co.'s 



land's Sterling 



prices in 



N. H. 



prices in Lon- 

 don. 



student's larger 

 microscope, 



NO. 4, A. 



LEVER-STAGE MI- 

 CROSCOPE. 



$70 

 15 



00' 

 00 









30 



00 









18 



00 









6 



00 



■ 







5 



00 









3 



00 









5 



00 









6 



00 J 





£18 



14 



20 



00 



2 



10 



2 



00 







6 



4 



00 







12 



3 



00 







10 



30 



00 





4 



4 



$217 



00 



£26 



16 



